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Influence of Surface Roughness on Cavitation in a Centrifugal Pump

Groß, Tim F. ; Ludwig, Gerhard ; Pelz, Peter F. (2022)
Influence of Surface Roughness on Cavitation in a Centrifugal Pump.
3rd International Rotating Equipment Conference (IREC) - Pumps and Compressors. Düsseldorf, Germany (14.-15.09.2016)
doi: 10.26083/tuprints-00020907
Conference or Workshop Item, Secondary publication, Publisher's Version

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Item Type: Conference or Workshop Item
Type of entry: Secondary publication
Title: Influence of Surface Roughness on Cavitation in a Centrifugal Pump
Language: English
Date: 2022
Place of Publication: Darmstadt
Year of primary publication: 2016
Publisher: VDMA
Book Title: 3rd International Rotating Equipment Conference - Pump Users International Forum 2016 : 14 and 15 September 2016 Congress Center Düsseldorf, Germany : proceedings
Collation: 10 Seiten
Event Title: 3rd International Rotating Equipment Conference (IREC) - Pumps and Compressors
Event Location: Düsseldorf, Germany
Event Dates: 14.-15.09.2016
DOI: 10.26083/tuprints-00020907
Origin: Secondary publication service

Cavitation in centrifugal pumps is still a problem that must be dealt with by engineers and operators of such devices. Noise and vibration, erosion and limitations of the operating range (NPSH(3%)) are the most obvious consequences caused by cavitation. An efficient and reliable operation of centrifugal pumps is only possible if operators and designers have experience and knowledge about the different cavitation regimes that might occur and that differ in erosive potential and aggressiveness. The present paper shows how different surface roughnesses on the blades of the impeller influence the form of appearance of cavitation. Different cavitation regimes influence the NPSH curves and the corresponding NPSH(3%) values only slightly even if appearance and size of the cavitation areas differ remarkably. The experiments also showed that cavitation and cavitation inception in centrifugal pumps is strongly affected by the occurrence of gap cavitation at the impeller side gap. Cavitation clouds produced at the gap are sucked into the pump and initiate cavitation at the leading edge of the blades. In this way large cavitation areas can develop even if the NPSH value is far away from the NPSH(3%) limit.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-209070
Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 16 Department of Mechanical Engineering > Institute for Fluid Systems (FST) (since 01.10.2006)
Date Deposited: 02 May 2022 13:13
Last Modified: 29 Mar 2023 10:04
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20907
PPN: 495503983
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